Investigators determined a 20-year-old man was driving a red Acura Integra at high speed on the northbound freeway when the car veered off the right side of the freeway, overturned and crashed into a pole, Castro said.

It was unclear whether drugs or alcohol played a role in the crash.

The driver and sole occupant was pronounced dead at the scene, the officer said. His name was withheld pending family notification.

Authorities shut down the northbound I-805 connector to northbound state Route 163 and the right two lanes of northbound I-805 near Balboa Avenue for the crash clean-up.